-84.02% is the change from 970 to 155
Calculation steps:
[( 155 - 970 ) ÷ 970] x 100 = -84.02%
Formula
Percentage change = [(155 - 970) / 970] x 100
Subtract the new number by the original number
155 - 970 = -815
-815 ÷ 970 = -0.8402061855670103
-0.8402061855670103 x 100 = -84.02%